Balance window-sash.



H. KNOX.

BALANCE WINDOW SASH.

APPLIGATION FILED DEO.19, 1911.

1,026,398, Patented May 14, 1912.

2 SHEETS-SHEET 1.

WITNESSES:

INVENTOR,

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A TTORNEY.

COLUMBIA PLANDGRM'N co.,w/\s 11111111111 c,

H. KNOX.

BALANCE WINDOW SASH.

APPLICATION FILED DEO.19,1911'.

1,026,398, Patented May 14, 1912.

2 SHEETS-SHEET 2.

ATTORNEY.

ATEN FTC.

HERBERT KNOX, OF WAREHOUSE POINT, CONNECTICUT.

BALANCE WINDOW-SASH.

Specification of Letters Patent.

Application filed December 19, 1911.

Patented May 14:, 1912. Serial No. 666,669.

T 0 all whom it may concern:

Be it known that I, HERBERT Knox, a citizen of the United States of America, and resident of \Tarehouse Point, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Balance Vindow-Sashes, of which the following is a full, clear, and exact description.

This invention relates to improvements in window casings with sashes therein, of a kind in which there is a connection between the one sash and the other, not only for a balancing effect so that the necessity of sash weights is avoided, but whereby any vertical movement of the one sash will cause a vertical movement of the other sash in an equal extent but in a reversed direction.

An object of the invention is to so con struct and combine the parts that the pulley which is employed for guiding the flexible connection and which is secured to both of the sashes may have its location in the vertical pocket alongside of the window casing at any suitable point lower than the top of such casing. And a further. object is for the simplification and rendering unusually efficient devices comprised in combination with a window casing and sashes.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings :Figure 1 is a face view of a side portion of a window casing showing sashes therein, the vertical wall at the edge of the casing being represented in ver tical section. Fig. 2 is an elevation as seen at the right hand portion of Fig. 1; Fig. 8 is a horizontal cross sectional view on line 33, Fig. 1. Fig. a is a horizontal cross sectional view on line +tl, Fig. 1. Fig. 5 is a vertical sectional view on line 55, Fig. 2. Fig. 6 is an inner face view of the part shown in Fig. Fig. 7 is a view similar to Fig. l but sashes both located in the same plane, edgewise abutting when closed and operative to move up from, and toward, each other through the connections comprised in my invention. Fig. 8 is a view similar to Fig. 2 but showing changed rela tions of the parts to accord with the modification. Figs. 9 and 10 are horizontal sections on lines 99 and 1010, Fig. 7. Fig. 11 is a vertical cross section in detail on line 1111, Fig. 7. Fig. 12 is a view showing the aspect of the window casing when both sashes are opened to their maximum extent.

Similar characters of reference indicate corresponding parts in all of the views.

Inasmuch as the constructions and appliances are duplicated at opposite sides of the window casing, it is herein deemed necessary to only describe those at one side.

In Sheet 1 of the drawings, A represents a window casing in which the sashes B and B are movable as usual. G represents the wall at the edge of the window casing which separates the sash opening at the one side from the pocket at at the other side. The said wall has slots 6 and b in vertical par allel lines coincident with the planes of the sashes. The said edge wall C also has an aperture or mortise (Z therethrough at a location more or less below the top of the sash opening, and an attachment plate f is secured by screws upon or within the inner face of the window casing wall C, that is its face toward the sash opening; and this attachment plate is provided with a bracket 9 which extends through and beyond the said mortise and has a pulley 7L mounted on a pintle 2 carried by the bracket so that such pulley rotates in a plane at right angles to the faces of the sash, and so that but very little width of space for the occupancy thereof is required for the pocket. The edge wall of the window casing at the sash side is made with a vertical groove j for the reception therein ofthe parting bead 712, which parting bead extends vertically over the central portion of the pulley bracket attachment plate f.

As'represented in Fig. 5, the parting bead has a recess m at its inner edge to accommodate the thickness of the aforesaid attachment plate. Each sash is provided with a stud 0 and 0 which is extended through the edgewise adjacent slots Z) and and a flexible connection 2., such as a chain or a cord has by an intermediate portion thereof a running engagement around the said pulley, while its opposite depending ends are secured to the said studs. By raising the lower sash, the upper sash will through the described connections be lowered in an extent to equal the amount of the first named sash, and vice versa.

As indicated in Sheet 2 of the drawings, both sashes B and B are movable in guide grooves 10 therefor in the same plane. The

wall C has the slots 6 and Z2 therefor necessarily at different heights but both in line with each other, and the studs 0 and 0 for the respective sashes are projected through the slots and receive the connections therewith of the depending ends of the flexible connection t, the bracket supported guiding sheave h therefor being located in the pocket (4 at a location which is below the top of the upper sash.

Under the arrangements last described, a movement in a downward direction of the lower sash will cause a rising movement of the upper sash in a corresponding extent, and the window casing may be opened for its full height, the sashes in their opening movements entering spaces therefor above and below the opening which is normally closed by the sashes.

I claim 1. The combination with upper and lower sashes of a window casing having the vertical wall thereof made with guideways for the edge portions of the sashes, having vertical slots therethrough in lines with the sashes and having at an upper part thereof a mortise therethrough, a bracket extending through said mortise and outwardly beyond said wall, comprising an attachment plate secured to the inner face of said wall marginally of the mortise and having in its portion which is extended through and beyond the wall a pulley, studs on the respective sashes extending through adjacent slots, and

a flexible connection having an intermediate portion thereof in running engagement around the pulley and having its opposite depending ends secured to the studs of the separate sashes.

2. In combination, a window casing hav ing an edge wall dividing the sash opening at one side from a vertical pocket at the other side, upper and lower sashes vertically movable in parallel planes and said window casing wall having a vertical parting bead groove, and having slots in vertical parallel lines coincident with the planes of the sashes and provided with a mortise therethrough at a location below the top of the sash opening an attachment plate secured within the inner face of said window casing wall and provided with a bracket extending through and beyond the mortise and having a pulley rotatable in a plane at right angles to the faces of the sash, a parting bead in said groove and covering the said attachment plate, studs on the respective sashes and extending through the edgewise adjacent slots and a flexible connection in running engagement around said pulley and having its opposite depending ends secured to said studs.

Signed by me at Springfield, Mass, in presence of two subscribing witnesses.

HERBERT KNOX.

Witnesses:

G. R. DRIsooLL, WM. S. BnLLows.

fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

